Cr Doping WCoB-Based Ceramic with Improved Mechanical Property by Using SPS
The densification behavior,microstructure and mechanical properties of Cr doping WCoB-based ceramic composites,fabricated using the spark plasma sintering(SPS)technique were investigated.As the sintering temperature exceeds 1100 ℃,the relative density does not significantly change.The density and particle size of WCoB greatly influence the mechanical behavior of WCoB–10wt%Co composites.The content of secondary borides(Co2B)which are brittle phase,can influence the mechanical properties.The Co2B disappears when the temperature is above 1050 ℃.The Cr doping improves the hardness significantly.For the experimental conditions considered,the cermets with 10 wt%Cr addition and 1170℃ sintered temperature revealed best mechanical properties.The relative density and Vickers hardness of the cermets were 99.78%,17.87GPa,respectively.The results obtained provide insight into fabrication of ceramic composites with improved mechanical property.
ternary boride spark plasma sintering microstructure mechanical properties
Zhang Tong Yin Haiqing Yin Xiaolong Qu Xuanhui Zheng Qingjun
Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Bei Kennametal Inc,1600 Technology Way,PA 15650,USA
国际会议
北京
英文
896-902
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）